Signal for trains.



F. A. CASEY.

SIGNAL FOR TRAINS.

APPLICATION FILED JUNE30, 1906.

Patented July 1, 1913.

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Cam? Q 7 k UNTTE STATES PATENT oFFIoE.

FREDERICK A. CASEY, or BILLERICA. MASSACHUSETTS. ASSIGNOR OE -N-E-HALFT0 THE ASHTON VALVE COMPANY, or BOSTON MASSACHUSETTS, A CORPO ATION OFCONNECTICUT; ALBERT C. ASHTON, or SOMERVILLE, massacrrusn'r'rs; AND MARYN. CAsiaY, or BILLERICA', MASSACHUSETTS, EXECUTORS or SAID FREDERICK A.

CASEY, DECEASED.

KIGNAL FOR TRAINS.

T 0 all-10110111 it may concern- Be it known that I. FREDERICK A. CASEY,of Bille'ricaj, in the county of Middlese-vand State of Massachusetts,haveinvented a new "and useful Improvement in Signals for Trams, of

cation.

\vhichthe followingv is a"-spec-iti- My invention is mainly for use ontrains equipped with brakes operated by pressure in the train pipe andmyobject is to provide anaudible signal for indicating whether or notthere is more than a certain pressure in the train pipe, and also togive indication for other purposes, and my invention is an audiblesignal arranged to indicate an excess of pressure inthe train pipe.

A feature consists in the means for indi-j eating the presenceinthetra-in pipe of sufli cient pressure to operate the. brake.

Another feature consists in a whistle which is operated by the pressurein the train pipe, and which preferably operates without regard to theposit-ion occupied by the device controlling the exhaust.

Other feature are hereinafterdescribed.

In the drawings Figure 1 is a sectionalelevation of a signal embodyingmy invention"; Fig. 2 is an elevation of the main casing with the handleof the plug broken away; Fig. 3-is a section on line 3-3 of Fig. 1; Fig.4 is 'a section on line 44 of Fig. 1; and Fig.'5 is a detail hereinafterdescribed.

Casing A has inlet a for connection with the source of pressure and port0 leads to the groove b around the plug B. Port of connects the inletwith the valve is to be 7 hereinafter described. Plug B is tapered asshown to enter the casing. A and has a circuthe end of which are nutsI), I), the spring bearing against the casing and together with the nutsholding the plugin position in the casing, but with a yielding hold sothat the plug may be rotated or left in any desired position. .Pin 6acts as a stop for a plug B when it is in engagement with eithershoulder k of the casing. Attached to plug B Specification of LettersPatent.

The plug B has an extension-b is whistle support D \vhichcarries thewhistle member G which has ports leading to chamber 9 above whichextendslip 9, around which and up into chamber 9 the air passes in making itswhistling sound. -Attached to the whistle .support'D is member whichthrough arms E isconnected-with member v Patented July-1, 1913.Application filed June 30,1906. Serial No. 324,171. i

E which provides a support for member F.

in which moves the valve rod H. Valverod H has a cap h which is oneabutment of the spring It.

whistle. Conduit a, is controlled by valve is acting under the influenceof spring is and screw is and when the valve-is open the pressure maypass through conduit a to Valve h is attached to the other. end of rod Hand closes the conduit to the screw l: for protection to reed-L and hasI perforations is to act with the :reed 1: The

members, F and: D and their connections are the handle with which toturn the plugB.

In using my signal 'to indicate an excess of pressure in the train pipethe plug will have one of the ports I) in registrv withconduit (1 andfriction will hold the plug in place, and it may be left inthis positionin-.

definitely. the only function of the port 6 of plug B in this case beingto complete-a conduit from the inlet to valve is which will be soadjusted that if more .t-haria certain pressure is present in the train.pipethe valve will open and the air will pass through ports k and isacting upon reed k and 'giV-Y ing an audible signal while sueh excess ofpressure last-s.

I may also use the signal to determine whether or not there issufiicientpressure in the train pipe to operate the brakes and in thiscase when this information is desired.

the plug will be turned by its handle to If sullicient ,pressure'ispresent in the'train' pipe the reed is will give the signal and the plugmay .bethen turned so that port- I) will no longer register with conduita as in this use of my signal 1t is only desired to get information andnot to have the Sig nal keep sounding'while a certain condition.

lasts.

Conduit b 6" leads through the casing A from the inlet to theatmosphere, and is controlled by plug B. The latter has a port 6 whichin Fig. 1, is at right'angles with conduit Z) I), but when the plug 15turned 90 degrees from the positionv of Fig, 1 port b connects theportion 1) of the conduit with the portion b", thereby making an exhaustto the atmosphere because portion 6 leads to the atmosphere.

By turning the plug until stop I) en ages either shoulder It of thecasing an exhaust from the inlet through port b to the atmosphere willbe had and it will be seen that there will always be a conduit a}, b b,b, b leading to the whistle controlled only by the valve and this is animportant feature as it is very desirable to have the Whistle incondition for operation no matter What position the plug may occupy, itbeing only necessary to depress cap It in order to operate the whistleOne advantage of my signal is that the operator can be sure that thebrake will operate without being compelled to use the ex- .haust beforeit is needed. It will also be clear that the whistle of my signal cockwill not operate by mere turning of the handle and plug but requires amovement of valve 12. separate from that turning.

I do not claim by itself the feature of havs;

ing the Whistle operative in any position in this application .as Iintend to make that the subject of a separate application.

\Vhat l claim is:

1. In a signal of the character described the combination of a casinghaving an exhaust port; a plug mounted in the casing to control theexhaust port; an audible signal controlled by the plug and operative ata predetermined pressure; and a whistle carried by the plug andoperative in any position of the plug.

2' In a signal of the character dese bed the combination of a casinghaving an exhaust port; means movably mounted in the casing to controlthe exhaust port; a signal controlled by said movable means andoperative at a predetermined pressure; and a whistle carried by saidmovable means and operative in any position thereof.

FREDERICK A. CASEY. vlVitnesses G. A. ROCKWELL, ALBEaT C. ASHTON.

